1c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 2c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * linux/include/linux/ext2_fs.h 3c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 4c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Copyright (C) 1992, 1993, 1994, 1995 5c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Remy Card (card@masi.ibp.fr) 6c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Laboratoire MASI - Institut Blaise Pascal 7c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Universite Pierre et Marie Curie (Paris VI) 8c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 9c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * from 10c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 11c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * linux/include/linux/minix_fs.h 12c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 13c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Copyright (C) 1991, 1992 Linus Torvalds 14c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 15c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 16c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef _LINUX_EXT2_FS_H 17c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define _LINUX_EXT2_FS_H 18c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 19c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/types.h> 20c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 21c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 22c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The second extended filesystem constants/structures 23c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 24c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 25c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 26c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Define EXT2FS_DEBUG to produce debug messages 27c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 28c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#undef EXT2FS_DEBUG 29c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 30c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 31c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files 32c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 33c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_PREALLOCATE 34c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEFAULT_PREALLOC_BLOCKS 8 35c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 36c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 37c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The second extended file system version 38c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 39c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2FS_DATE "95/08/09" 40c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2FS_VERSION "0.5b" 41c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 42c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 43c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Debug code 44c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 45c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef EXT2FS_DEBUG 46c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define ext2_debug(f, a...) { \ 47c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru printk ("EXT2-fs DEBUG (%s, %d): %s:", \ 48c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __FILE__, __LINE__, __FUNCTION__); \ 49c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru printk (f, ## a); \ 50c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } 51c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 52c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define ext2_debug(f, a...) /**/ 53c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 54c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 55c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 56c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Special inode numbers 57c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 58c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_BAD_INO 1 /* Bad blocks inode */ 59c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ROOT_INO 2 /* Root inode */ 60c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ 61c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ 62c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 63c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* First non-reserved inode for old ext2 filesystems */ 64c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_GOOD_OLD_FIRST_INO 11 65c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 66c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 67c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The second extended file system magic number 68c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 69c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_SUPER_MAGIC 0xEF53 70c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 71c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __KERNEL__ 72c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/ext2_fs_sb.h> 73c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline struct ext2_sb_info *EXT2_SB(struct super_block *sb) 74c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 75c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return sb->s_fs_info; 76c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 77c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 78c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Assume that user mode programs are passing in an ext2fs superblock, not 79c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * a kernel struct super_block. This will allow us to call the feature-test 80c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * macros from user land. */ 81c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_SB(sb) (sb) 82c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 83c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 84c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 85c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Maximal count of links to a file 86c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 87c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_LINK_MAX 32000 88c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 89c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 90c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Macro-instructions used to manage several block sizes 91c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 92c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MIN_BLOCK_SIZE 1024 93c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MAX_BLOCK_SIZE 4096 94c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MIN_BLOCK_LOG_SIZE 10 95c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __KERNEL__ 96c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize) 97c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 98c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) 99c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 100c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32)) 101c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __KERNEL__ 102c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 103c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 104c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 105c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 106c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __KERNEL__ 107c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits) 108c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size) 109c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino) 110c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 111c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 112c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_GOOD_OLD_INODE_SIZE : \ 113c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru (s)->s_inode_size) 114c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 115c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_GOOD_OLD_FIRST_INO : \ 116c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru (s)->s_first_ino) 117c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 118c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 119c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 120c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Macro-instructions used to manage fragments 121c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 122c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MIN_FRAG_SIZE 1024 123c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MAX_FRAG_SIZE 4096 124c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MIN_FRAG_LOG_SIZE 10 125c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __KERNEL__ 126c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size) 127c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block) 128c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 129c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) 130c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) 131c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 132c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 133c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 134c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Structure of a blocks group descriptor 135c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 136c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct ext2_group_desc 137c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 138c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 bg_block_bitmap; /* Blocks bitmap block */ 139c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 bg_inode_bitmap; /* Inodes bitmap block */ 140c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 bg_inode_table; /* Inodes table block */ 141c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 bg_free_blocks_count; /* Free blocks count */ 142c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 bg_free_inodes_count; /* Free inodes count */ 143c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 bg_used_dirs_count; /* Directories count */ 144c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 bg_pad; 145c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 bg_reserved[3]; 146c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 147c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 148c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 149c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Macro-instructions used to manage group descriptors 150c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 151c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __KERNEL__ 152c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group) 153c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block) 154c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group) 155c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits) 156c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 157c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 158c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) 159c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 160c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 161c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 162c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 163c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Constants relative to the data blocks 164c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 165c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_NDIR_BLOCKS 12 166c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 167c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 168c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 169c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 170c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 171c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 172c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Inode flags 173c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 174c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_SECRM_FL 0x00000001 /* Secure deletion */ 175c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_UNRM_FL 0x00000002 /* Undelete */ 176c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_COMPR_FL 0x00000004 /* Compress file */ 177c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */ 178c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */ 179c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */ 180c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_NODUMP_FL 0x00000040 /* do not dump file */ 181c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_NOATIME_FL 0x00000080 /* do not update atime */ 182c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Reserved for compression usage... */ 183c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DIRTY_FL 0x00000100 184c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 185c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_NOCOMP_FL 0x00000400 /* Don't compress */ 186c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */ 187c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* End compression flags --- maybe not all used */ 188c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_BTREE_FL 0x00001000 /* btree format dir */ 189c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */ 190c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_IMAGIC_FL 0x00002000 /* AFS directory */ 191c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */ 192c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 193c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 194c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 195c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 196c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 197c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ 198c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ 199c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 200c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 201c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * ioctl commands 202c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 203c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_IOC_GETFLAGS _IOR('f', 1, long) 204c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_IOC_SETFLAGS _IOW('f', 2, long) 205c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_IOC_GETVERSION _IOR('v', 1, long) 206c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_IOC_SETVERSION _IOW('v', 2, long) 207c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 208c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 209c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Structure of an inode on the disk 210c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 211c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct ext2_inode { 212c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 i_mode; /* File mode */ 213c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 i_uid; /* Low 16 bits of Owner Uid */ 214c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_size; /* Size in bytes */ 215c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_atime; /* Access time */ 216c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_ctime; /* Creation time */ 217c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_mtime; /* Modification time */ 218c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_dtime; /* Deletion Time */ 219c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 i_gid; /* Low 16 bits of Group Id */ 220c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 i_links_count; /* Links count */ 221c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_blocks; /* Blocks count */ 222c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_flags; /* File flags */ 223c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru union { 224c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct { 225c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 l_i_reserved1; 226c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } linux1; 227c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct { 228c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 h_i_translator; 229c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } hurd1; 230c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct { 231c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 m_i_reserved1; 232c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } masix1; 233c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } osd1; /* OS dependent 1 */ 234c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ 235c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_generation; /* File version (for NFS) */ 236c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_file_acl; /* File ACL */ 237c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_dir_acl; /* Directory ACL */ 238c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 i_faddr; /* Fragment address */ 239c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru union { 240c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct { 241c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 l_i_frag; /* Fragment number */ 242c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 l_i_fsize; /* Fragment size */ 243c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u16 i_pad1; 244c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 l_i_uid_high; /* these 2 fields */ 245c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 l_i_gid_high; /* were reserved2[0] */ 246c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u32 l_i_reserved2; 247c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } linux2; 248c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct { 249c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 h_i_frag; /* Fragment number */ 250c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 h_i_fsize; /* Fragment size */ 251c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 h_i_mode_high; 252c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 h_i_uid_high; 253c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 h_i_gid_high; 254c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 h_i_author; 255c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } hurd2; 256c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct { 257c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 m_i_frag; /* Fragment number */ 258c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 m_i_fsize; /* Fragment size */ 259c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u16 m_pad1; 260c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u32 m_i_reserved2[2]; 261c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } masix2; 262c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } osd2; /* OS dependent 2 */ 263c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 264c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 265c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_size_high i_dir_acl 266c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 267c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#if defined(__KERNEL__) || defined(__linux__) 268c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_reserved1 osd1.linux1.l_i_reserved1 269c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_frag osd2.linux2.l_i_frag 270c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_fsize osd2.linux2.l_i_fsize 271c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_uid_low i_uid 272c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_gid_low i_gid 273c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_uid_high osd2.linux2.l_i_uid_high 274c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_gid_high osd2.linux2.l_i_gid_high 275c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_reserved2 osd2.linux2.l_i_reserved2 276c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 277c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 278c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __hurd__ 279c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_translator osd1.hurd1.h_i_translator 280c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_frag osd2.hurd2.h_i_frag; 281c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_fsize osd2.hurd2.h_i_fsize; 282c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_uid_high osd2.hurd2.h_i_uid_high 283c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_gid_high osd2.hurd2.h_i_gid_high 284c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_author osd2.hurd2.h_i_author 285c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 286c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 287c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef __masix__ 288c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_reserved1 osd1.masix1.m_i_reserved1 289c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_frag osd2.masix2.m_i_frag 290c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_fsize osd2.masix2.m_i_fsize 291c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define i_reserved2 osd2.masix2.m_i_reserved2 292c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 293c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 294c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 295c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * File system states 296c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 297c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ 298c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ERROR_FS 0x0002 /* Errors detected */ 299c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 300c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 301c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Mount flags 302c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 303c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_CHECK 0x000001 /* Do mount-time checks */ 304c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_OLDALLOC 0x000002 /* Don't use the new Orlov allocator */ 305c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_GRPID 0x000004 /* Create files with directory's group */ 306c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_DEBUG 0x000008 /* Some debugging messages */ 307c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_ERRORS_CONT 0x000010 /* Continue on errors */ 308c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_ERRORS_RO 0x000020 /* Remount fs ro on errors */ 309c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_ERRORS_PANIC 0x000040 /* Panic on errors */ 310c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_MINIX_DF 0x000080 /* Mimics the Minix statfs */ 311c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_NOBH 0x000100 /* No buffer_heads */ 312c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */ 313c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */ 314c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */ 315c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_XIP 0x010000 /* Execute in place */ 316c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */ 317c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */ 318c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 319c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 320c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt 321c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define set_opt(o, opt) o |= EXT2_MOUNT_##opt 322c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \ 323c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_MOUNT_##opt) 324c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 325c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Maximal mount counts between two filesystem checks 326c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 327c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 328c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 329c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 330c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 331c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Behaviour when detecting errors 332c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 333c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ 334c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ERRORS_RO 2 /* Remount fs read-only */ 335c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ERRORS_PANIC 3 /* Panic */ 336c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE 337c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 338c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 339c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Structure of the super block 340c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 341c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct ext2_super_block { 342c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_inodes_count; /* Inodes count */ 343c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_blocks_count; /* Blocks count */ 344c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_r_blocks_count; /* Reserved blocks count */ 345c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_free_blocks_count; /* Free blocks count */ 346c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_free_inodes_count; /* Free inodes count */ 347c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_first_data_block; /* First Data Block */ 348c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_log_block_size; /* Block size */ 349c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_log_frag_size; /* Fragment size */ 350c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_blocks_per_group; /* # Blocks per group */ 351c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_frags_per_group; /* # Fragments per group */ 352c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_inodes_per_group; /* # Inodes per group */ 353c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_mtime; /* Mount time */ 354c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_wtime; /* Write time */ 355c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_mnt_count; /* Mount count */ 356c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_max_mnt_count; /* Maximal mount count */ 357c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_magic; /* Magic signature */ 358c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_state; /* File system state */ 359c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_errors; /* Behaviour when detecting errors */ 360c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_minor_rev_level; /* minor revision level */ 361c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_lastcheck; /* time of last check */ 362c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_checkinterval; /* max. time between checks */ 363c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_creator_os; /* OS */ 364c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_rev_level; /* Revision level */ 365c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_def_resuid; /* Default uid for reserved blocks */ 366c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_def_resgid; /* Default gid for reserved blocks */ 367c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru /* 368c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * These fields are for EXT2_DYNAMIC_REV superblocks only. 369c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 370c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Note: the difference between the compatible feature set and 371c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * the incompatible feature set is that if there is a bit set 372c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * in the incompatible feature set that the kernel doesn't 373c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * know about, it should refuse to mount the filesystem. 374c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 375c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * e2fsck's requirements are more strict; if it doesn't know 376c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * about a feature in either the compatible or incompatible 377c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * feature set, it must abort and not try to meddle with 378c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * things it doesn't understand... 379c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 380c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_first_ino; /* First non-reserved inode */ 381c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_inode_size; /* size of inode structure */ 382c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 s_block_group_nr; /* block group # of this superblock */ 383c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_feature_compat; /* compatible feature set */ 384c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_feature_incompat; /* incompatible feature set */ 385c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 386c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 s_uuid[16]; /* 128-bit uuid for volume */ 387c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru char s_volume_name[16]; /* volume name */ 388c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru char s_last_mounted[64]; /* directory where last mounted */ 389c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_algorithm_usage_bitmap; /* For compression */ 390c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru /* 391c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Performance hints. Directory preallocation should only 392c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * happen if the EXT2_COMPAT_PREALLOC flag is on. 393c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 394c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 395c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 396c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u16 s_padding1; 397c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru /* 398c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. 399c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 400c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 401c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u32 s_journal_inum; /* inode number of journal file */ 402c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u32 s_journal_dev; /* device number of journal file */ 403c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u32 s_last_orphan; /* start of list of inodes to delete */ 404c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u32 s_hash_seed[4]; /* HTREE hash seed */ 405c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 s_def_hash_version; /* Default hash version to use */ 406c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 s_reserved_char_pad; 407c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u16 s_reserved_word_pad; 408c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_default_mount_opts; 409c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 s_first_meta_bg; /* First metablock block group */ 410c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u32 s_reserved[190]; /* Padding to the end of the block */ 411c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 412c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 413c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 414c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Codes for operating systems 415c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 416c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_OS_LINUX 0 417c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_OS_HURD 1 418c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_OS_MASIX 2 419c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_OS_FREEBSD 3 420c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_OS_LITES 4 421c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 422c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 423c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Revision levels 424c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 425c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ 426c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 427c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 428c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV 429c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV 430c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 431c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_GOOD_OLD_INODE_SIZE 128 432c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 433c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 434c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Feature set definitions 435c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 436c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 437c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ 438c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) 439c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 440c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) 441c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ 442c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) 443c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_SET_COMPAT_FEATURE(sb,mask) \ 444c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) 445c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \ 446c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) 447c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \ 448c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) 449c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \ 450c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) 451c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ 452c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) 453c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ 454c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) 455c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 456c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 457c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 458c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 459c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 460c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010 461c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 462c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_COMPAT_ANY 0xffffffff 463c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 464c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 465c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 466c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 467c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff 468c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 469c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 470c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 471c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 472c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 473c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 474c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff 475c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 476c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR 477c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \ 478c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FEATURE_INCOMPAT_META_BG) 479c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 480c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ 481c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FEATURE_RO_COMPAT_BTREE_DIR) 482c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP 483c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP 484c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 485c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 486c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Default values for user and/or group using reserved blocks 487c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 488c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEF_RESUID 0 489c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEF_RESGID 0 490c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 491c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 492c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Default mount options 493c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 494c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEFM_DEBUG 0x0001 495c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEFM_BSDGROUPS 0x0002 496c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEFM_XATTR_USER 0x0004 497c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEFM_ACL 0x0008 498c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DEFM_UID16 0x0010 499c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru /* Not used by ext2, but reserved for use by ext3 */ 500c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT3_DEFM_JMODE 0x0060 501c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT3_DEFM_JMODE_DATA 0x0020 502c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT3_DEFM_JMODE_ORDERED 0x0040 503c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT3_DEFM_JMODE_WBACK 0x0060 504c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 505c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 506c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Structure of a directory entry 507c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 508c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_NAME_LEN 255 509c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 510c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct ext2_dir_entry { 511c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 inode; /* Inode number */ 512c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 rec_len; /* Directory entry length */ 513c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 name_len; /* Name length */ 514c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru char name[EXT2_NAME_LEN]; /* File name */ 515c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 516c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 517c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 518c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The new version of the directory entry. Since EXT2 structures are 519c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * stored in intel byte order, and the name_len field could never be 520c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * bigger than 255 chars, it's safe to reclaim the extra byte for the 521c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * file_type field. 522c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 523c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct ext2_dir_entry_2 { 524c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le32 inode; /* Inode number */ 525c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __le16 rec_len; /* Directory entry length */ 526c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 name_len; /* Name length */ 527c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __u8 file_type; 528c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru char name[EXT2_NAME_LEN]; /* File name */ 529c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 530c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 531c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 532c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Ext2 directory file types. Only the low 3 bits are used. The 533c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * other bits are reserved for now. 534c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 535c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruenum { 536c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_UNKNOWN, 537c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_REG_FILE, 538c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_DIR, 539c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_CHRDEV, 540c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_BLKDEV, 541c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_FIFO, 542c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_SOCK, 543c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_SYMLINK, 544c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru EXT2_FT_MAX 545c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 546c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 547c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 548c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * EXT2_DIR_PAD defines the directory entries boundaries 549c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 550c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * NOTE: It must be a multiple of 4 551c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 552c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DIR_PAD 4 553c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) 554c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ 555c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru ~EXT2_DIR_ROUND) 556c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 557c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* _LINUX_EXT2_FS_H */ 558